Coal screening and washing machine



w. `F. MARTIN.

COAL SCREENING AND WASHING MACHINE.

APPLICATION FILED MAY I8. 1922i 2. m Z wm w. w n W IM m @Rot/Mega W'. F. MARTIN.

-COAL'SCREENING ANDYWASHING MACHINE.

APPLICATION FILED MAY I8. 1922.

Patented Deel 5,1922.

2 SHEETS-SHEET z.

Patented Dec. El, 1.92232.

laatse i COAL SCREENING.- AND TASHENG MACHINE.

application sied tray To all whoml may concern y Be it known that l, 'llfrnmnir lf., MARTIN, a citizen of the United States, residing at lflformleysburo', in the county of Dauphin and State of ennsylvania, have invented certain new and useful improvements in loal Screening and llashing Machines; and do declare the following to be a full, clear, and exact description of the invention,` such as will enable others skilled in the art to which it appertains to make and use the same. y

My invention relates to screening devices for coal, ore, and the like and the present disclosure has reference more particularly to screening machines in which the material to be screened is fed to the screening machine with a stream of water. A machine of this character was patented by me on April 11th, 1922, No. 1,412,291 and whereas this machine has been highly advantageous in performing certain screening` operations, it is the principal object of the present invention to im prove upon the construction of the patented machine, by providing means for continually mlsating the movable sides of the several vpockets which receive the waste material washed through the screen. By thus pulsating the pocket sides, the waste material and 'water fiowing into the pockets, is continually agitated so that whenever the pockets are in open position, they will fully discharge their contents, thereby preventing any undesirable accumulation which has been found to occur when screening certain forms of materials with the patented machine.

ln carrying out the above end, a further aim of the invention is to operate the pulsating means for the pocket sides by a water wheel driven from the water which is discharged through the screen, whereby no additional expense need be entailed for power. lit will be understood however that my invention is not restricted to the use of a water wheel to furnish the power for pulsating the pocket sides.

lli/'ith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawings.

Figure 1 is a side elevation of the improved machine.

Figure 2 is a longitudinal sectional view with the pockets in open position.

Serial No. 561,978.

Figure 3 is a transverse section as indicated by line 3 3 of lllig. 1.

d'igure t is a duplicate of Fig. 2 with the exception that it illustrates the pockets in closed position.

Figure 5 is a top plan view.

ln the drawings above briefiy described, 'the numeral 1 designates a suitable frame which is preferably inclined as shown. A screen 2 is fiXedly mounted in the upper portion of the frame anda plurality of collecting pockets 3 are formed beneath said screen to receive the waste material, said pockets being here shown of il-shape with straight sides, although they might be of other shapes and provided with curved sides if desired. Each pocket is provided with a' movable side wall t which is by preference pivotally mounted on hinges or the like as indicated at 5. A connecting rod 6 is pivoted 7 to the lower edges of the movable sides t andis connected by a link 8 with an eccentric 9 on a .transverse rock shaft 10 which extends across the upper end of the frame 1. This general construction and arrangement is about the same as that shown` in lijatent- 1,412,291 above referred to, but whereas the rock shaft of this patent was provided with a hand-lever, this lever is now eliminated and means are provided for continually oscillating the shaft 10 so that a longitudinal reciprocation of the connecting rod 6 is produced, which movement will al- .ternately open and close the movable pocket sides a, thereby effectively agitating the contents cf said pockets so that they will be readily discharged instead of accumulating.

ln the preferred form of construction, one of the ends of the rock shaft 10 is provided with a crank arm llrwhich is usually 1ocated on the exterior of the frame 1.k A pitman rod 12 is connected with the arm 11,

preferably by providing a bolt 13 which may be passed through any one of the openings 14 in the crank arm, so thatk the rof:k ing movement of the shaft 10 may be changed as occasion may require. Moreover, the length of the pitman rod 12 is preferably adjustable by means of an appropriate turnbuckle or the like 15 so that the closing and opening movement of the pocket sides a may be controlled, as may be found most advantageous. The pitman rod 12 is adapted to be reciprocated by any appropriate power, but I prefer to connect said pitman rod with an eccentric 16 on the shaft 17 of a Water Wheel 18, the latter being,` located beneath the discharge spout 19 which declines from the short bottom 20 of the frame l. By this arrangement, the Water lovvinp,` through the screen 2 onto the bottom 20, Will llorv from the latter through the spout CQ and will thus operate the Water Wheel 18, so that Without added expense, the connections l2, 1l, l0, S and 6, are operated to continually pulsate the movable sides l ot the pockets 3.

lWhile any suitable supports may be provided for the shaft 17 and its Water wheel 18, l prefer to secure icl-shaped frames 2l to the iframe l as clearlj.7 shown in the drawings.

From the foregoing, taken in connection With the accompanying illustration, it will be seen that by pulsating` one side of the pockets 3, l have produced a substantial improvement over my patented machine. Since excellent results may be obtained from the details disclosed, they may Well be followed, but Within the scope of the invention as claimed, numerous minor changes may of course be made.

I claim:

l. A screening machine comprisinga frame having a screen, a bottom for the upper end portion of said 'frame terminating in a discharge spout, collecting pockets beneath said screen each having a movable side, a connecting rod extending beneath said pockets and pivotally connected to the movable sides thereof, a transverse rock shaft mounted in the trame and having an eccentric connected to said rod, a Water Wheel rotatably mounted beneath said frame and rotated by Water running from said spout, and means for transmitting movement from said Water Wheel to said rock shaft for rocking said shaft.

2. A screening machine comprising a frame having a screen, collecting pockets beneath said screen each having a movable side, a bottom in part oit *he frame to receive Water running through the screen, a Water Wheel driven by Water running from said bottom, and operating connections between said Water Wheel and said movable pocket sides for continually pulsating the latter.

3. A screening` machine comprising a frame, a screen therein, collecting pockets in the frame beneath the screen each having a pivoted side Wall, a connecting rod beneath said pockets pivotcd to the pivoted sides thereof, a transverse roclr shaft in the frame having an eccentric connected to said connecting` rod, a crank arm on said .rock shaft, a pitman connected to said crank arm, and a Water Wheelmounted below the frame and having an eccentric connected with said pitman.

ln testimony whereof l have hereunto set my hand.

lVlLLlAM l?. MARTN. 

